Engineering:Bentley S1

Bentley S1
Overview
Manufacturer	Bentley Motors (1931) Limited
Production	1955–1959 3,538 produced
Assembly	Crewe, Cheshire, England
Body and chassis
Class	Full-size luxury car
Body style	4-door saloon 2-door coupe
Layout	FR layout
Platform	separate chassis
Related	Bentley S1 Continental Rolls-Royce Silver Cloud
Powertrain
Engine	4.9 L I6
Transmission	4-speed automatic
Dimensions
Wheelbase	123 in (3,124 mm) 127 in (3,226 mm)
Length	211.75 in (5,378 mm)
Width	1,898.65 mm (74 3⁄4 in)
Height	1,631.95 mm (64 1⁄4 in)
uk|uk|Kerb|Curb}} weight	1,924 kg (4,242 lb)
Chronology
Predecessor	R Type
Successor	S2

The Bentley S1 (originally simply "Bentley S") was a luxury car produced by Bentley Motors Limited from 1955 until 1959. The S1 was derived from Rolls-Royce's complete redesign of its standard production car after World War II, the Silver Cloud. Each was its maker's last standard production car with an independent chassis. The S-series Bentley was given the Rolls-Royce - Bentley L Series V8 engine in late 1959 and named the S2. Twin headlamps and a facelift to the front arrived in late 1962, resulting in the S3. In late 1965, the S3 was replaced by the new unitary construction Rolls-Royce Silver Shadow-derived T series.

Bentley standard steel saloon

The car was announced at the end of April 1955, and it was noted that the existing Continental model would continue. The new standard steel saloon replaced the R type standard steel saloon which had been in production, with modifications, since 1946. It was a more generously sized five- or six-seater saloon, with the body manufactured in pressed steel with stressed skin construction. Doors, bonnet [hood] and luggage locker lid [trunk lid] were of aluminium.

Having a totally new external appearance, although with the traditional radiator grille, the main differences from the R type were:

• three inches longer wheelbase
• lower build without reducing headroom and with an enlarged luggage boot [trunk]
• softer suspension with electrically operated control of rear dampers
• lighter steering and improved braking
• engine capacity increased to 4887cc, the same size as used in the Bentley Continental
• four-speed automatic gearbox was standard, with ability to select individual ratios if desired.

Standard and long wheelbase saloon and chassis

As with the preceding Mark VI and R type Bentleys, there was almost no difference between standard Bentley and Rolls-Royce models; this Bentley S differing only in its radiator grille shape and badging from the Rolls-Royce Silver Cloud I.

The models shared the 4.9 L (4887 cc/298 in³) straight-6 engine. They were the last vehicles to be powered by descendants of the engine originally used in the Rolls-Royce Twenty from 1922 to 1929. The bore was 95.25 mm (3.750 in), stroke was 114.3 mm (4.50 in) and compression ratio 6.6:1. Twin SU carburetors were fitted, with upgraded models from 1957. A 4-speed automatic transmission was standard.

Two wheelbases were produced: 123 inches (3,100 mm) and, from 1957, 127 inches (3,200 mm).

A standard-wheelbase car tested by the British magazine The Motor in 1957 had a top speed of 103 mph (166 km/h) and could accelerate from 0–60 mph (0–97 km/h) in 13.1 seconds. A fuel consumption of 16.1 miles per imperial gallon (17.5 L/100 km; 13.4 mpg_‑US) was recorded. The test car, which had the optional power steering, cost £6305 including taxes of £1803.

Production

• S: 3,072 (145 with coachbuilt bodies)
• S long wheelbase: 35 (12 with coachbuilt bodies)

S Continental

Bentley S Continental
Park Ward Continental Drophead Coupé, also available as a Fixed-Head Coupé
Overview
Manufacturer	Park Ward, London, on chassis provided by Bentley Motors (1931) Limited
Assembly	Crewe, Cheshire, then London
Body and chassis
Class	Full-size luxury car
Body style	4-seater 2-door fixed-head coupé or drophead coupé
Layout	FR layout
Platform	separate chassis
Related	Rolls-Royce Silver Cloud
Powertrain
Engine	4.9 L I6
Transmission	4-speed automatic
Dimensions
Wheelbase	123 in (3,100 mm) 3,225.8 mm (127.00 in)
Length	210.5 in (5,350 mm)
Width	1,828.8 mm (72.00 in)
Height	1,587.5 mm (62 1⁄2 in)
uk|uk|Kerb|Curb}} weight	1,803.5 kg (3,976 lb)

A high-performance version S Continental (chassis only) was introduced six months after the introduction of the S1. Lighter weight fixed-head and drophead coupé bodies were provided to special order (for a premium of about 50%) by H. J. Mulliner & Co., Park Ward, James Young and Freestone & Webb. A pre-production 2-seater fixed-head coupé on the new chassis was designed and built for the Bentley factory by Pininfarina.

• 

  Park Ward

• 

  Park Ward

• 

  H. J. Mulliner

• 

  H. J. Mulliner

• 

  H. J. Mulliner

Production

• S Continental: 431